Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vao vat cong snippets" » "vao bat cong snippets", "vao sat cong snippets", "vao vat con snippets", "van vat cong snippets", "tao vat cong snippets", "va vat cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("vao vat cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vao vat cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vao vat cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vao vat cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.